The following validations are covered:

• there must be at least one output field
• target field property of outputs is required if there is more then one mining schema field with usage type property set to target
• target field property is now a select, its options are mining schema fields with target usage type
• when a mining schema field changes from usage type target to a different usage type, output fields which target that mining field get updated and their target field property is reset
• same as above when a mining schema field with usage type target is deleted
• rank property and value property cannot be used together. when rank property is disabled, also rank order is
• unsupported options disabled in the feature property ("decision" and "transformed value")